M2 pitch

[Brian Dorricott 1]

Does anyone know the M2 clevis(s) available from model shops pitch I.e. are they M2x0.4 or M2x0.45 it never states on the packet . I want to replace some nylon rubbish that came with an old ARTF Funfly and the pushrods are longer than the normal 300mm size.

Thanks in anticipation

[Denis Watkins]

Posted by Brian Dorricott 1 on 15/08/2020 09:52:14:

Does anyone know the M2 clevis(s) available from model shops pitch I.e. are they M2x0.4 or M2x0.45 it never states on the packet . I want to replace some nylon rubbish that came with an old ARTF Funfly and the pushrods are longer than the normal 300mm size.

Thanks in anticipation

 

My wire gauge says your M2 are 0.4 Brian

But the way that some are spun up at high speed, I can see your dilemma

Some stated M2 rods are in fact 2.2mm and these are threaded 0.45

 

Edited By Denis Watkins on 15/08/2020 10:29:17

[GONZO]

Useful info on threads, pitch, taping drill etc from Modelfixings Thread Data

[kc]

The threads on things like rc control rods, spokes etc are often ( always?) rolled threads - that is the rod itself is undersize and the thread is not cut into but rolled = spread outwards. Therefore just measuring the rod material diameter suggests it's undersize. Means you cannot cut a satisfactory thread with a die.

If the thread is uncertain ( it could be a US thread)  then replacing the old clevis with a SLEC nylon clevis with split pin might be the answer.

 

Edited By kc on 15/08/2020 11:20:38

[Engine Doctor]

Also add that when you have sorted and adjusted the clevis run some cyano into the thread to stop it chattering . The threads are so poorly made that many over the years have eventually slipped after chattering back and forth Cyano prevents it and can easily be un-done with some heat .